The Infinity Files

The Infinity Files by S. M. Wilson
 
Ash Yang dreamed of being a starfighter pilot, but when she crashes out of her final test, she somehow lands the most powerful job in the universe: Guardian of the Infinity Files. As Guardian, she must secretly planet-hop through galaxies, stealing or returning treasures that have the power to stop wars—or start them. But when her own planet is caught in a devastating war, can she use her new skills to save it?
 
This action-packed space opera is perfect for fans of Doctor Who and Guardians of the Galaxy.